Paul drendul



(No Model.)

P. DR'ENDUL.

SANDv SCREEN.

No. 437,025.' Y 'Patented sept. 2s, 1890.

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PAUL DRENDUL, OF CHICAGO, ILLINOIS, ASSIGNOR TO LOUIS G. BEERS, OF SAME PLACE.

sANDfsCREEN.

SPECIFICATION forming part of Letters Eatent No. 437,025, dated September 23, 1890.

Application led February 3, 1890. Serial No. 338,986. (No model.)

To all whom it may concern:

Be it known that I, PAUL DRENDUL, a citizen of the United States, residing at Chicago, Cook county, Illinois, have invented certain newand usefulImprovements in Sand=Screens and the Method of Making the Sameof which the following is a specification.

My invention relates to Wire sand-screens, and is especially adapted to that class of screens in which the wires are secured longitudinally in a frame and at proper distances apart to permit of the separation of the smaller or finer particles of sand from the coarser ones or from gravel or other substances; and it consists, essentially,in the peculiar and novel method of securing the wires, as Will be hereinafter more fully set forth and specifically claimed.

The objects of my invention are to provide screens which shall be simple in construction, strong and durable, yet quite inexpensive7 and `to more effectually secure and retain the longitudinal Wires in their proper positions, thereby avoiding any displacement thereof and the necessity of frequent repairs. I attain these objects by the simple construction and arrangement of the dierent partswhich I employ, and in order to enable others skilled in the'art t0 which my invention pertains to make and use the same, I Will now proceed to describe it, referring to the accompanying drawings, in Which-- Figure 1 a plan View of my screen. Fig. 2 is an enlarged front View of a portion of the same. Fig. Bis a vertical sectional View showing the manner of securing the longitudinal Wires to the cross rods or braces, and Fig. 4 is a rear view of a portion of the screen.

Similar letters refer to like parts throughout the different views of the drawings.

A represents the main or supportingframe of my screen, which is usually made of wood, and of any desired size and form suitable for the purpose for which the screen is designed to be used.

B B are a number of Wire rods or strands of proper size and length, which form and constitute the screening body or surface, and are placed and secured parallel with each other and longitudinally Within the frame A, near each end thereof, to suitable cross-pieces in any desirable manner.

C O are a series of retainingcoils, lnade of wire of suitable size, and formed into a coil or spiral shape, as shown in the drawings.

D D are metal rods for securing and supporting or bracing the Wires B B at their rear, and are secured to the side pieces of the main frame A by means of screw-nuts or otherwise, as desired.

The retaining\vires O are formed into a coil or spiral shape, each coil having the same diameter, and of sufficient size to admit of the easy insertion of the rods or braces D at the rear of the screening-Wires B, as is shown in Figs. 3 and 4, and will be readily understood. Y

By reference to the drawings it will be seen that the coils of the retainingwires C progress spirally, and when placed and secured in position on the longitudinal wires B they will extend diagonally across the same from side to side of the frame. It is also apparent that when the coiled wire C is placed upon the face or front of the Wires B, forming the screening-surface, and pressed into position the larger part of the coil will be at the rear of the Wires B, and that the front part of each coil will lie diagonally across the face of one of the longitudinal Wires, and firmly secure it to the rod D, which is passed through the rear portion of the coils, as seen in Fig. 3, and secured at each end to the sides of the frame, thus assisting in retaining the screening-wires, and also aording abrace to resist the effect of the force of the sand or other material when it is thrown against the face of the screen. Bg the use of these spirallycoiled retaining-Wires I not only firmly secure the Wires B to the rod D by diagonally encircling each longitudinal wire with one of the coils, but I also hold them (the screening- Wires) in perfect alignment with each other, and regulate the distance or space between them by the use 0f a large or small Wire, as the distance or space may require.

Having thus fully described my invention, What I claim as new, and desire to secure by- Letters Patent, is

l. The herein-described method of making IOO the coiled wires being placed on the face of the screening-wires, and their eonvolutions pressed between and to the rear of the paral- 15 lel wires, substantially as shown and described, and for the purpose set forth.

In witness whereof I have hereunto set my hand and aiiixed my seal this 31st day of January, 1890. v

PAUL DRENDUL. ['L. s] Witnesses:

C. C. TILLMAN, F. T. ROBINsoN. 

